Cov yam ntxwv thiab kev siv ntawm infrared LED teeb hlaws

Cov pa infrared LED teeb hlaws zoo ib yam li pom dav dav LED teeb hlaws hauv qhov tsos, tab sis nws tawm lub teeb infrared. Qhov hluav taws xob feem ntau yog 1.4V, thiab qhov ua haujlwm tam sim no feem ntau tsawg dua 20mA. Txhawm rau hloov mus rau qhov sib txawv ua haujlwm voltage, finite tam sim no resistor feem ntau txuas nrog hauv series hauv lub voj.

Thaum lub teeb infrared LED hlaws siv los tswj cov cuab yeej tswj tau sib xws, kev tswj qhov deb yog proportional rau lub zog emission. Txhawm rau txhawm rau txhawm rau ua kom lub raj xa hluav taws xob infrared ua haujlwm hauv lub xeev pulse, vim tias qhov sib kis tau zoo ntawm lub teeb mem tes yog proportional rau cua-induced tam sim no ntawm mem tes, qhov emission nrug ntawm lub teeb infrared tuaj yeem nce ntxiv xwb los ntawm kev nce lub ncov IP kom ntau li ntau tau. Txoj hauv kev los txhim kho IP yog txo cov pulse lub luag hauj lwm piv, uas yog, kom compress lub mem tes dav T, thiab kom txo tau lub pulse luag hauj lwm piv kuj kuj zoo heev ua rau kom lub emission nrug ntawm tsawg -lub zog infrared teeb{{2 }} emitting diodes. Lub zog ntawm lub teeb infrared zoo tib yam -emitting diodes tuaj yeem muab faib ua peb pawg: lub zog qis, lub zog nruab nrab thiab lub zog siab. Txhawm rau tsim cov teeb pom kev zoo, tsuas yog cov mem tes voltage ntawm qee zaus ntxiv rau lub raj tsav tsheb.

Thaum lub teeb infrared emitting diode emits infrared los tswj cov cuab yeej tswj, muaj cov khoom sib xws infrared photoelectric hloov dua siab tshiab hauv cov khoom tswj, xws li infrared txais diode, infrared txais lub taub hau, photosensitive triode, thiab lwm yam.

Muaj ob txoj hauv kev xa thiab tau txais cov kab hluav taws xob infrared: ncaj qha thiab kev xav. Lub teeb ncaj qha- emitting raj thiab lub raj txais tau kuj tau muab tso rau ntawm ob qhov kawg ntawm cov emissions thiab cov khoom tswj, nrog rau qee qhov kev ncua deb ntawm lawv; lub teeb pom kev zoo- emitting raj thiab lub raj tau txais nyob rau hauv qhov sib npaug, feem ntau lub raj tau txais ib txwm tsis muaj lub teeb, tsuas yog thaum lub teeb infrared emission los ntawm lub teeb - emitting raj ntsib lub reflector, lub raj txais tau txais lub teeb ci infrared ua haujlwm. Ob chav raj infrared emission Circuit Court tuaj yeem txhim kho lub zog emission thiab nce kev ua haujlwm ntawm infrared emission.Raws li cov yam ntxwv ntawm infrared LED teeb hlaws, nws tuaj yeem siv dav raws li qhov sib txawv wavelengths:

1. Wavelength: 808nm, haum rau cov khoom siv kho mob, chaw sib txuas lus kho qhov muag, teeb pom kev zoo infrared, khoom laser twj tso kua mis lub teeb;

2. Wavelength: 830nm, haum rau daim npav tsis siv neeg swiping system ntawm siab - txoj kev ceev (kev pom kev hmo ntuj yog qhov zoo tshaj plaws, koj tuaj yeem pom lub teeb liab me ntsis ntawm lub raj tub ntxhais, cov nyhuv zoo dua 850nm);

3. Wavelength: 840nm, haum rau lub koob yees duab, xim zoom infrared waterproof;

4. wavelength: 850nm, haum rau lub koob yees duab, digital photography, saib xyuas, chav tsev intercom, anti- tswb tswb, infrared waterproof;

5. Wavelength: 870nm, haum rau cov koob yees duab hauv khw thiab kev sib tshuam;

6. Wavelength: 940nm, haum rau cov chaw taws teeb tswj, xws li cov chaw taws teeb tswj ntawm cov khoom siv hauv tsev.